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Distinction of parallel outflows in L1448 through H2 excitation

Davis, C.J., Smith, M.D. (1995) Distinction of parallel outflows in L1448 through H2 excitation. Astrophysical Journal, 443 (1 P.2). L41-L43. ISSN 0004-637X. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Abstract

High-resolution infrared maps of the emission from warm molecular gas in the L1448 outflow region are presented. Comparison of images from H2 lines produced from the first and second vibrational levels demonstrates the presence of two distinct parallel outflows. The main outflow (from the L1148-mm source) is of high excitation and shows remarkably little spatial variation in the 1-0 S(1)/2-1 S(1) intensity ratio, which remains near 10 across the whole ridge. Two explanations are offered: (a) the ridge consists of numerous fine-scale C-type bow shocks and/or (b) supersonic turbulence in a shear layer generates a C-type self-similar shock velocity distribution. The second outflow (from the 1RS 3 source) is of low excitation, suggesting a combination of lower density and temperature.

Item Type: Article
Uncontrolled keywords: ISM: jets and outflows, ISM: kinematics and dynamics, Stars: mass loss
Subjects: Q Science > QB Astronomy > QB460 Astrophysics
Divisions: Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: Giles Tarver
Date Deposited: 11 Aug 2015 10:20 UTC
Last Modified: 29 May 2019 15:55 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/50160 (The current URI for this page, for reference purposes)
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